Q: Which of the following is the correct formula for density?

$\text{Density} = \dfrac{\text{mass}}{\text{volume}}$

Q: Which of the following is the correct conceptual plan for converting $1.76$ yards to centimeters?

$1.76\ \text{yd} \rightarrow \text{m} \rightarrow \text{cm}$

Q: Which of the following is the correct energy conversion factor between calories and joules?

$1\ \text{cal} = 4.184\ \text{J}$

Question 1

Which of the following statements best describes the difference between qualitative and quantitative measurements in chemistry?

Accepted Answer

Qualitative measurements are descriptive, such as color changes, while quantitative measurements involve numerical values obtained from instruments.

Question 2

A student measures the mass of a sample as 0.00430 g. How many significant figures does this measurement have?

Accepted Answer

4

Question 3

Which of the following is an example of an exact number in chemistry?

Accepted Answer

The number of centimeters in a meter

Question 4

A graduated cylinder contains a liquid with the meniscus resting between 4.5 and 4.6 mL. If the cylinder is marked every 0.1 mL, what is the correct way to record the volume?

Accepted Answer

$4.56$ mL

Question 5

Which temperature scale has no negative values?

Accepted Answer

Kelvin

Question 6

Convert $25.0\ ^\circ C$ to Kelvin using the appropriate formula.

Accepted Answer

$K = ^\circ C + 273.15 = 25.0 + 273.15 = 298.15\ K$

Question 7

A sample of copper is heated from $25\ ^\circ C$ to $100\ ^\circ C$. What happens to its density?

Accepted Answer

The density decreases because the sample expands.

Question 8

Which of the following is the correct formula for density?

Accepted Answer

$	ext{Density} = \dfrac{	ext{mass}}{	ext{volume}}$

Question 9

A 747 jet is fueled with $173,231$ L of jet fuel with a density of $0.768\ g/cm^3$. What is the mass of the fuel in kilograms? (1 L = 1000 mL, 1 mL = 1 cm$^3$)

Accepted Answer

$133,100$ kg

Question 10

Which of the following best describes the difference between precision and accuracy?

Accepted Answer

Precision is how close repeated measurements are to each other; accuracy is how close a measurement is to the true value.

Question 11

Which of the following is an example of a systematic (determinate) error?

Accepted Answer

A balance that is not zeroed, causing all mass measurements to be too high.

Question 12

When multiplying $2.34$ (3 significant figures) by $1.1$ (2 significant figures), how many significant figures should the answer have?

Accepted Answer

2

Question 13

Which of the following is the correct conceptual plan for converting $1.76$ yards to centimeters?

Accepted Answer

$1.76\ 	ext{yd} ightarrow 	ext{m} ightarrow 	ext{cm}$

Question 14

Which of the following best describes an exothermic process?

Accepted Answer

The system loses heat to the surroundings and the energy of the system decreases.

Question 15

Which of the following is the correct energy conversion factor between calories and joules?

Accepted Answer

$1\ 	ext{cal} = 4.184\ 	ext{J}$

Question 16

A vineyard has $145$ acres of Chardonnay grapes. If a soil supplement requires $5.50\ g$ for every square meter, how many kilograms are needed for the entire vineyard? (1 acre = 4046.86 m$^2$)

Accepted Answer

$3,220$ kg

Question 17

Which of the following best describes the First Law of Thermodynamics?

Accepted Answer

The energy of the universe is conserved.

Question 18

Which of the following is the correct formula for converting Celsius to Fahrenheit?

Accepted Answer

$^\circ F = (^\circ C 	imes \dfrac{9}{5}) + 32$

Question 19

A drop of gasoline has a mass of $22$ mg and a density of $0.702\ g/cm^3$. What is its volume in cubic centimeters?

Accepted Answer

$0.0313\ cm^3$

Essentials: Units, Measurement, and Problem Solving – Mini-Textbook Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards